Squirrels - keeping them away

How do I keep them away from my peach tree?? Every year they destroy every peach on the tree. I do not have a bird feeder on the tree.I heard that cocoa shells help to keep them away and perhaps dry blood fertilizer. Killing them is against the law here, so I can't put out any poison. Anyone have any remedies that worked for them?

The old gardeners used to put a scrap of fur in peach trees to scare away birds (they would think there was a predator hiding there) Don't know if this would work with squirrels tho - they are cunning devils! There are also animal deterants available - maybe you could spray it on?